Under the UCCJEA (a statute), once you live in a state for more than 6 months it becomes the children's home state. You can expect to have a fight on your hands over jurisdiction (which state is the home state), even if it is clear that you returned to the state where you just moved from, because it sounds like he will want to litigate in NY and wants to keep you here.
Generally, this is a complicated matter and you should talk to a lawyer in each state, but the longer you reside in New York, the more likely that it will become the home state.
Answered on Oct 14th, 2014 at 6:35 AM